高精度多通道K型热电偶温度测量  

Temperature Measurement of the High Precision Multi-Channel K-Type Thermocouple

作　　者：曹毅 宗情 付继峰 万盛 施健 CAO Yi;ZONG Qing;FU Jifeng;WAN Sheng;SHI Jian(Shanghai MicroPowers Co.,Ltd.,Shanghai 201203,China;Shanghai Marine Diesel Research Institute,Shanghai 201203,China)

机构地区：[1]上海齐耀动力技术有限公司,上海201203 [2]上海船用柴油机研究所,上海201203

出　　处：《柴油机》2023年第2期22-25,56,共5页Diesel Engine

基　　金：上海启明星计划(22QB1403900)。

摘　　要：根据热气机运行特点、控制参数要求和成本控制要求,设计一种基于PIC18F6722单片机的K型热电偶温度测量方法。单片机在0~600℃时采用查表法计算热电偶温度,在600~750℃时采用拟合线性化方法计算热电偶信号温度。在3000 h的热气机可靠性试验中,在630℃、670℃和700℃等3个热气机额定工况运行点上,该方法能将热气机管壁温度控制在±2℃内,且成本较低,满足设计要求。Based on the operating characteristics,control parameter requirements,and cost control requirements of Stirling engines,a K-type thermocouple temperature measurement method based on PIC18F6722 single-chip microcomputer was designed.The single-chip microcomputer used a table lookup method to calculate the thermocouple temperature at 0-600℃,and a fitting linearization method to calculate the thermocouple signal temperature at 600-750℃.In the 3000 h reliability test of the Stirling engine,this method could control the wall temperature of the Stirling engine within±2℃at three rated operating points of 630℃,670℃,and 700℃,the cost was low,and could meet the design requirements.

关 键 词：K型热电偶 温度 测量 高精度 

分 类 号：U664.124[交通运输工程—船舶及航道工程] TP212.11[交通运输工程—船舶与海洋工程]